/*
 * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.engine.impl.scripting;

import static java.util.Arrays.asList;

import java.util.List;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.ActivitiIllegalArgumentException;
import org.activiti.engine.delegate.VariableScope;
import org.activiti.engine.impl.cfg.ProcessEngineConfigurationImpl;
import org.activiti.engine.impl.persistence.entity.ExecutionEntity;
import org.activiti.engine.impl.persistence.entity.TaskEntity;

public class VariableScopeResolver implements Resolver {

    protected ProcessEngineConfigurationImpl processEngineConfiguration;
    protected VariableScope variableScope;

    protected String variableScopeKey = "execution";

    protected static final String processEngineConfigurationKey = "processEngineConfiguration";
    protected static final String runtimeServiceKey = "runtimeService";
    protected static final String taskServiceKey = "taskService";
    protected static final String repositoryServiceKey = "repositoryService";
    protected static final String managementServiceKey = "managementService";
    protected static final String historyServiceKey = "historyService";
    protected static final String formServiceKey = "formService";

    protected static final List<String> KEYS = asList(
        processEngineConfigurationKey,
        runtimeServiceKey,
        taskServiceKey,
        repositoryServiceKey,
        managementServiceKey,
        historyServiceKey,
        formServiceKey
    );

    public VariableScopeResolver(
        ProcessEngineConfigurationImpl processEngineConfiguration,
        VariableScope variableScope
    ) {
        this.processEngineConfiguration = processEngineConfiguration;

        if (variableScope == null) {
            throw new ActivitiIllegalArgumentException("variableScope cannot be null");
        }
        if (variableScope instanceof ExecutionEntity) {
            variableScopeKey = "execution";
        } else if (variableScope instanceof TaskEntity) {
            variableScopeKey = "task";
        } else {
            throw new ActivitiException("unsupported variable scope type: " + variableScope.getClass().getName());
        }
        this.variableScope = variableScope;
    }

    public boolean containsKey(Object key) {
        return variableScopeKey.equals(key) || KEYS.contains(key) || variableScope.hasVariable((String) key);
    }

    public Object get(Object key) {
        if (variableScopeKey.equals(key)) {
            return variableScope;
        } else if (processEngineConfigurationKey.equals(key)) {
            return processEngineConfiguration;
        } else if (runtimeServiceKey.equals(key)) {
            return processEngineConfiguration.getRuntimeService();
        } else if (taskServiceKey.equals(key)) {
            return processEngineConfiguration.getTaskService();
        } else if (repositoryServiceKey.equals(key)) {
            return processEngineConfiguration.getRepositoryService();
        } else if (managementServiceKey.equals(key)) {
            return processEngineConfiguration.getManagementService();
        }

        return variableScope.getVariable((String) key);
    }
}
